p53 Gene Mutations in Barrett's Epithelium and Esophageal Cancer1

p53 gene mutations in Barrett's epithelium and esophageal cancer.

Genomic DNA was extracted from archival pathology specimens comprising 10 squamous and 14 adenocarcinomas, including 7 with Barrett's epithelium adjacent to tumor, and corresponding normal esophagus from the resection margin. The polymerase chain reaction was used to amplify selected exons of p53 which were analyzed for mutations using single-strand conformation polymorphism analysis. Mutations...

Identification of p53 Gene Mutations among Iranian Patients Involved with Esophageal Squamous Cell Carcinoma: the Efficiency of the Two Different Methods

P53 mutational status improves estimation of prognosis in patients with curatively resected adenocarcinoma in Barrett's esophagus.

The incidence of adenocarcinomas in Barrett's esophagus has been rising in the last two decades in the United States and Western Europe for yet unknown reasons. We reported previously a large multi-institutional trial implicating p53 mutations as being involved in the pathogenesis of Barrett's cancer and representing an early marker for the malignant potential of Barrett's epithelium. A prospec...

p53 in esophageal adenocarcinoma: a critical reassessment of mutation frequency and identification of 72Arg as the dominant allele.

p53 alterations have been implicated in the progression of Barrett's esophagus to esophageal adenocarcinoma. However, the wide range of reported p53 alteration frequencies in esophageal adenocarcinoma makes using p53 as a marker of malignant transformation of Barrett's esophagus problematic. To determine the utility of p53 in Barrett's esophagus monitoring, the frequency of p53 alteration was c...

17p allelic deletions and p53 protein overexpression in Barrett's adenocarcinoma.

Barrett's esophagus is a condition in which the stratified squamous epithelium of the esophagus is replaced by metaplastic columnar epithelium that predisposes to the development of esophageal adenocarcinoma. Allelic deletions of 17p and alterations of p53 including elevated p53 protein levels have been observed in many different tumors. To investigate the presence of 17p allelic deletions and ...